def goods(item_name, **kwargs):
    if item_name in kwargs:
        return kwargs[item_name]
    else:
        return "商场没有此商品"

a = {"自行车": 2000, "小汽车": 200000, "卡车": 400000, "菊花茶": 200, "玩具积木": 100, "划水艇": 999999}
print(goods("设计",**a))